180 ZOOPHYTES. 



Hemispherical; disks usually elongate and meandering. Corallum 

 with the branches | to l inches thick, usually much compressed, 

 exterior striate and for an inch or more serrato-dentate ; cells some- 

 times simple, but often sinuous and 2 to 5 inches long ; lamellae 

 stout, broad dentate and inciso-dentate, J to an inch exsert ; inter- 

 vals between the calicles, nearly half an inch broad. 



Plate 8, fig. 1 a, 1 b, 1 c, outline of cell and lamellae. 



East Indies, Esper, Gmelin. Red Sea, Ehreriberg. 



The frequent sinuous character of the cells at once distinguishes 

 this species from the preceding ; yet some single calicles are very 

 similar to those of the cactus. The lamellae are very unequal. The 

 cells at bottom are finely convoluto-porous. The calicles are mostly 

 about $ of an inch broad at top ; but they vary from \ to 1 \ inches. 

 They are larger, more irregular, and are separated by wider spaces 

 than in the cytherea. 



Madrepora angulosa, var. y, Ellis and So- Caryophyttia simiosa, Lamarck, 2d ed. ii. 



lander, 153, tab. 34. The figure is 357, No. 14. 



good ; it represents a convex clump nine , Lamour., Exp. 50, pi. 34 ; Encyc., 



inches in diameter. 173. 



Madrepora cristata, Esper, i. 150, tab. 26. Lithodendron cristatum, Schweig. 416. 



Probably the same species, though the Lobophyllia sinuosa, Blainv. Man. 356. 



calicles are not quite so long and sinuous. Caryophyllia cristata, Ehrenberg, op. cit. 



The exterior though striate is but spar- G. Iviii. sp. 1. The animal is stated to 



ingly echinate. From the China Sea. resemble that of the M. corymbosa. 



8. MUSSA CYTHEREA. (Dana.} 



M. bene hemispherica, discis scepius linearibus et meandrinis. Corallum 

 ramis scepius valde compressis, " crassis et "-5" latis, creberrimis 

 extus superne striatulis et parce echinatis ; cella scepe elongato-sinuosa 

 (5"); lamellis majoribus valde exsertis, cum 3-5 minoribus intermediis, 

 apice late subtruncatis et 23-incisis. 



Regularly hemispherical ; disks mostly linear and meandering. Co- 

 rallum having the branches usually much compressed, an inch 

 thick, and to 5 inches broad, closely crowded ; exterior striate 

 above, and sparingly echinate ; cell often 5 inches long and sinu- 



